Early detection of thinning of retinal nerve fiber layer in glaucomatous eyes by optical coherence tomography 3000: Analysis of retinal nerve fiber layer corresponding to the preserved hemivisual field

Abstract

The retinal nerve fiber layer (RNFL) thickness was measured with the optical coherence tomography using version 3.0 software (OCT3000) in 153 eyes of 153 normal subjects. The mean of the average RNFL thickness over the entire 360° in the control group was 92.5 ± 12.9 μm which was significantly thinner than the normative data of 95.9 ± 11.4 μm included with the OCT3000 (p < 0.01). The RNFL thickness decreased with increasing age (p < 0.01, r = -0.395). The RNFL thickness was also measured in 53 eyes of 53 patients with glaucoma whose superior (13 eyes) or inferior (40 eyes) perimetric hemifields were normal. Only the RNFL thickness corresponding to the preserved perimetric hemifields were measured by OCT3000 and scanning laser ophthalmoscopy (SLO). The RNFL thickness in the superior and inferior 30° sectors, the maximum and average RNFL thickness in the superior (S max and Savg), and inferior quadrants (Imax and Iavg) were analyzed. The Smax, Savg, I max, Iavg, and the RNFL thickness in the superior (p < 0.05), superotemporal and inferotemporal sectors (p < 0.01) in the glaucoma patients without a nerve fiber layer defect (SLO) were significantly thinner than in the control subjects in same age. OCT3000 measurements showed that the RNFL thickness in glaucomatous eyes with normal perimetric visual fields and SLO was significantly thinner than the RNFL thickness in normal eyes. Copyright © 2006 S. Karger AG.